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arrowspace SKILL.md skillA

arrowspace from francostino/opencode-skills-collection is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add francostino/opencode-skills-collection/arrowspace@git:20261015.fac8b7e

Pins git:20261015.fac8b7e in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: francostino/opencode-skills-collection
Path: bundled-skills/arrowspace/SKILL.md
Versions recorded: 2
Latest version: git:20261015.fac8b7e, committed Oct 15, 2026
First version recorded: Jun 27, 2026
Size: 5,005 bytes
Repository stars: 90
License: MIT

Spectral vector search using graph Laplacian eigenstructure. Use when cosine/L2 similarity misses latent structure in your embeddings.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# ArrowSpace

Spectral vector search that augments nearest-neighbour search with graph Laplacian features. Computes a Laplacian over the item graph and uses the Rayleigh quotient to produce a λτ (lambda-tau) score per item, enabling search that respects both semantic similarity and structural role.

## When to Use This Skill

- Cosine or L2 similarity misses latent structure in your embeddings
- You want graph-based retrieval with spectral awareness
- You need to characterise the spectral properties of an embedding space
- You are building RAG pipelines where contextual role matters alongside semantic content

## How It Works

### Step 1: Install and import

```bash
python3 -m pip install "arrowspace==0.28.1" numpy  # review/pin remaining dependencies in an isolated environment
```

```python
from arrowspace import ArrowSpaceBuilder
import numpy as np
```

### Step 2: Prepare your data

Pass an (N, d) float64 NumPy array of embedding vectors:

```python
rng = np.random.default_rng(7)
items = rng.normal(size=(32, 8)).astype(np.float64)
items /= np.linalg.norm(items, axis=1, keepdims=True)
```

### Step 3: Configure graph parameters

```python
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add francostino/opencode-skills-collection/arrowspace@sha256:b38694f1227bbc1e

The line at the top of this page pins the label git:20261015.fac8b7e, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_ycfybcmuu4dgrwid.svg)](https://markdownregistry.com/a/art_ycfybcmuu4dgrwid)

5 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 2 versions of this file, between Jun 27, 2026 and Oct 15, 2026, about one every 110 days.

version	committed	commit	size	audit
git:20261015.fac8b7e latest	2026-10-15	fac8b7e	5,005 B	A	view · diff
git:20260627.1b10aa1	2026-06-27	1b10aa1	3,876 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (5005 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

francostino/opencode-skills-collection · 90 stars · license MIT · pushed 2026-11-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ycfybcmuu4dgrwid
GET https://markdownregistry.com/api/v1/resolve?ref=francostino/opencode-skills-collection/arrowspace
GET https://markdownregistry.com/api/v1/blob/b38694f1227bbc1e0332519a0b3372f961414f4ca798c8734e33a886cb8a6db6

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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